Comments

People have repeatedly expected that you can do things like snapshotting
an image with qemu-img while a qemu instance is running. Maybe we need
to consider locking the files while they are in use, but having a
warning in the qemu-img manpage is doable for 1.2 and can't hurt anyway.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
qemu-img.texi | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)

Patch

diff --git a/qemu-img.texi b/qemu-img.texiindex 77c6d0b..77b2c47 100644--- a/qemu-img.texi+++ b/qemu-img.texi@@ -4,6 +4,14 @@ usage: qemu-img command [command options]
@c man end
@end example
+@c man begin DESCRIPTION+qemu-img allows you to create, convert and modify images offline. It can handle+all image formats supported by QEMU.++@b{Warning:} Never use qemu-img to modify images in use by a running virtual+machine or any other process; this may destroy the image.+@c man end+
@c man begin OPTIONS
The following commands are supported: